package com.atguigu.gulimall.auth.controller;

import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BusinessErrorCodeEnum;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.common.to.UserLoginVO;
import com.atguigu.gulimall.auth.vo.UserRegisterVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class loginController {

    @Autowired
    private ThirdPartFeignService thirdPartFeignService;
    @Autowired
    StringRedisTemplate redisTemplate;
    @Autowired
    private MemberFeignService memberFeignService;

    /**
     * 发送一个请求直接跳转到一个页面。
     * SpringMVC viewcontroller；将请求和页面映射过来.
     */

    @GetMapping("/sms/sendcode")
    @ResponseBody
    public R sendCode(@RequestParam("phone") String phone) {
        // TODO 1、接口防刷。

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 600000) {
                // 60秒内不能再发
                return R.error(BusinessErrorCodeEnum.VALID_SMS_CODE_EXCEPTION);
            }
        }

        // 2、验证码的再次校验。redis。存key-phone，value-code   sms:code:15757821696 -> 123456
        String code = UUID.randomUUID().toString().substring(0, 5);
        String subString = code + "_" + System.currentTimeMillis();
        // redis缓存验证码，防止同一个phone在60秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, subString, 10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone, code);
        return R.ok();
    }

    /**
     *  // TODO 重定向携带数据，利用 session原理。将数据放在session中。
     *          只要跳到下一个页面取出这个数据以后，session里面的数据就会删掉
     *
     *  // TODO 1、分布式下的session问题。
     *
     * RedirectAttributes redirectAttributes：模拟重定向携带数据
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String register(@Valid @RequestBody UserRegisterVO vo, BindingResult result,
                           RedirectAttributes redirectAttributes,
                           HttpSession session) {
        if (result.hasErrors()) {
            /*result.getFieldErrors().stream().map(filedError -> {
                String field = filedError.getField();
                String defaultMessage = filedErro r.getDefaultMessage();
                errors.put(field, defaultMessage);
                return errors;
            });*/
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
//            model.addAttribute("errors", errors);
            redirectAttributes.addFlashAttribute("errors", errors);
            // Request method 'POST' not supported
            // 用户注册 -> /regist[post]----》转发/reg.html（路径映射默认是get方式访问的。）

//            session.set
            // 校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        // 1、校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])) {
                // 删除验证码;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                // 验证码通过    // 真正注册。调用远程服务进行注册
                R r = memberFeignService.register(vo);
                if (r.getCode() == 0) {
                    // 成功
                    // 注册成功回到首页，回到登入页
                    return "redirect:http://auth.gulimall.com/login.html";
                } else {
                    Map<String, String> errors = new HashMap<String, String>();
                    errors.put("msg", r.getMsg());
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            } else {
                Map<String, String> errors = new HashMap<String, String>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                // 校验出错，转发到注册页
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        } else {
            Map<String, String> errors = new HashMap<String, String>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            // 校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVO vo, RedirectAttributes redirectAttributes) {
        // 远程登录
        R login = memberFeignService.login(vo);
        if (login.getCode() == 0) {
            // 成功
            return "redirect:http://gulimall.com";
        } else {
            Map<String, String> errors = new HashMap<String, String>();
            errors.put("msg", login.getMsg());
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }
}
